Machine Design
Which process will increase the fatigue duration of parts?

Electroplating
De-carburisation
Finishing and polishing
Shot-peening

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Machine Design
In case of thick cylinders, the tangential stress across the thickness of cylinder is

Maximum at the inner surface and zero at the outer surface
Maximum at the inner surface and minimum at the outer surface
Maximum at the outer surface and zero at the inner surface
Maximum at the outer surface and minimum at the inner surface

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